The 4WEH25E50B-6EG24NETZ5L Type Electro-Hydraulic Directional Control Valve is a high-performance electro-hydraulic pilot-operated directional valve designed to control the flow and direction of hydraulic fluid in large-flow hydraulic systems. Combining a solenoid-operated pilot stage with a hydraulically actuated main spool, this valve enables precise control of hydraulic actuators such as cylinders and motors. It is widely used in construction machinery, industrial automation, hydraulic presses, injection molding machines, steel and metallurgical equipment, and mobile hydraulic systems.

Working Principle

The 4WEH25E50B valve integrates a solenoid-operated pilot valve and a hydraulically actuated main spool:

1. Solenoid energized: Electrical current activates the pilot solenoid, directing pilot oil to shift the main spool.
2. Main spool movement: Hydraulic pressure moves the main spool to connect the desired ports (P → A/B, B/A → T) allowing actuator control.
3. De-energized: Spring or hydraulic return moves the spool back to the neutral position.

Advantages of this pilot-operated design include:

• Handling high flow rates (up to 500 L/min)
• Smooth spool operation under high pressure
• Reduced solenoid power requirement
• Improved reliability and system life

Product Features

• Electro-hydraulic pilot-operated directional control
• 4-way, 3-position spool design for flexible flow control
• High flow capacity for NG25 systems
• Stable switching performance with low impact and smooth operation
• Fast response due to solenoid pilot actuation
• Modular ISO standard subplate mounting
• Low pressure loss and energy-efficient operation
• Optional manual override function for maintenance
• Long service life and suitable for continuous industrial operation